Influences of blocked obstacles on propagation of gaseous detonation in pipeline

Yu Jianliang; Zhang Dong; Yan Xingqing

doi:10.11883/1001-1455(2017)03-0447-06

Volume 37 Issue 3

Apr. 2017

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Yu Jianliang, Zhang Dong, Yan Xingqing. Influences of blocked obstacles on propagation of gaseous detonation in pipeline[J]. Explosion And Shock Waves, 2017, 37(3): 447-452. doi: 10.11883/1001-1455(2017)03-0447-06

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Yu Jianliang, Zhang Dong, Yan Xingqing. Influences of blocked obstacles on propagation of gaseous detonation in pipeline[J]. Explosion And Shock Waves, 2017, 37(3): 447-452. doi: 10.11883/1001-1455(2017)03-0447-06

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Influences of blocked obstacles on propagation of gaseous detonation in pipeline

doi: 10.11883/1001-1455(2017)03-0447-06

School of Chemical Machinery and Security, Dalian University of Technology, Dalian 116024, Liaoning, China

Received Date: 2015-09-17
Rev Recd Date: 2015-12-25
Publish Date: 2017-05-25

Abstract

Abstract

An experimental circular pipeline with a length of 2 800 mm and a diameter of 50 mm was established to study the gaseous detonation propagation. Photodiode detectors were used to obtain the flame propagation velocity and the smoke film method to get the cellular structures. Polypropylene films with the blocking rate of 1.0 were set in the pipeline to investigate the characteristics of detonation velocity and cellular structures. Gaseous mixtures of C₂H₂+ 2.5O₂ diluted by argon in different volumes were used as experimental medium. The initial pressures varied in experiments. Results show that there are two different propagation forms after the detonation wave passes through the film obstacles, including velocity deficit and detonation failure. The propagation of gaseous detonation wave in blocked obstructions can be divided into three stages: stage of steady propagation, stage of velocity deficit or detonation failure and stage of overdriven detonation.
- detonation wave,
- blocking obstacles,
- velocity deficit,
- detonation failure

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References(13)

References

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